595.1757. 584 (leetcode)문제

595. Big Countries

https://leetcode.com/problems/big-countries/description/?envType=study-plan&id=sql-i

SELECT name, population,area
FROM world
WHERE area >= 3000000 OR population >= 25000000

1757. Recyclable and Low Fat Products

https://leetcode.com/problems/recyclable-and-low-fat-products/description/?envType=study-plan&id=sql-i

SELECT product_id
FROM products
WHERE low_fats = "Y" AND recyclable = "Y"

584. Find Customer Referee

https://leetcode.com/problems/find-customer-referee/?envType=study-plan&id=sql-i

SELECT name
FROM customer
WHERE referee_id != 2 OR referee_id is null